However, you overlooked the real issue: that damage is not caused by the marijuana, but by the laws prohibiting it.

Do we see these problems in broccoli fields? Do tomato farmers abuse their lands in these ways?

The same kinds of damage occurred at bootlegging still during alcohol prohibition and at the cocaine plantations in Colombia. We see this damage at the labs of home-made meth, not at the pharmaceutical plants that produce meth under the name Desoxyn for prescription to children with ADHD.